In Islam, the Munafiqun ('Hypocrites', Arabic: منافقون‎‎, singular munāfiq) were a group decried in the Quran as outward Muslims who were secretly unsympathetic to the cause of Muslims and actively sought to undermine the Muslim community. The hypocrisy itself is called nifāq (Arabic: نفاق‎‎).

The Prophet Muhammad said, "Whoever has the following four (characteristics) will be a pure hypocrite and whoever has one of the following four characteristics will have one characteristic of hypocrisy unless and until he gives it up.

Whenever he is entrusted, he betrays.

Whenever he speaks, he tells a lie.

Whenever he makes a covenant, he proves treacherous.

Whenever he quarrels, he behaves in a very imprudent, evil and insulting manner."